Corrosion-resistant and wear-resistant jarosite slag underflow pump with protective plate

Abstract

The utility model belongs to the technical field of pumps, and discloses a corrosion-resistant and wear-resistant jarosite slag underflow pump with a protective plate, which aims to solve the technical problems existing in the jarosite slag underflow pump in the prior art, and comprises a pump shell, a pump outlet arranged on the pump shell, a pump cover arranged on one side of the pump shell, a pump inlet arranged on the pump cover, and a bearing box arranged on the other side of the pump shell, a pump shaft is arranged in the pump shell, an impeller is further arranged in the pump shell and installed at one end of the pump shell, polyethylene linings are arranged in the pump shell and the pump cover, a front protection plate is arranged at the position, close to a pump inlet, in the pump shell and the pump cover, guide vanes are arranged on the front protection plate in the circumferential direction, the front protection plate is matched with the impeller, and a rear protection plate is arranged on the side, close to a bearing box, in the impeller. The pump shell and the pump cover adopt the cast iron pump shell, the pump cover and the polyethylene lining structure, and the corrosion-resistant and wear-resistant dual-phase steel protection plate is arranged, so that plastic lining layers at easy-to-wear parts in the pump shell and the pump cover can be protected from being worn, the service life of the pump shell and the pump cover is prolonged, and the use cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of pumps, in particular to a corrosion-resistant and wear-resistant iron alum slag underflow pump with a guard plate. Background Art

[0002] The iron alum slag underflow pump is a slurry pump commonly used in metal smelters. Since the pump conveying medium is highly corrosive and contains a large amount of solid hard particles, the flow-through parts in the pump must be manufactured using corrosion-resistant and wear-resistant materials. Currently, the commonly used materials are polyethylene or duplex steel. Polyethylene has excellent corrosion resistance, but poor wear resistance. Although the material is low-cost, it requires frequent maintenance, and the service life of the pump casing and pump cover is short. For example, the anti-blocking, corrosion-resistant and efficient waste acid delivery pump disclosed in patent CN202220803148.9 uses polyethylene lining material. Duplex steel has better corrosion resistance and wear resistance, but the material and processing costs are expensive, and the user's use cost is high. The existing technology cannot solve the above technical problems. Utility Model Content

[0003] The utility model aims to solve the technical problems existing in the prior art iron alum slag underflow pump and provides a corrosion-resistant and wear-resistant iron alum slag underflow pump with a guard plate.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A corrosion-resistant and wear-resistant iron alum slag underflow pump with a guard plate comprises a pump casing, a pump outlet is arranged on the pump casing, a pump cover is arranged on one side of the pump casing, a pump inlet is arranged on the pump cover, a bearing box is arranged on the other side of the pump casing, a pump shaft is arranged in the pump casing, an impeller is also arranged in the pump casing, and the impeller is installed at one end of the pump casing, a polyethylene liner is arranged in the pump casing and the pump cover, a front guard plate is arranged in the pump casing and the pump cover near the pump inlet, a guide vane is arranged on the front guard plate in a circumferential direction, and the front guard plate cooperates with the impeller, and a rear guard plate is arranged on the side of the impeller near the bearing box.

[0006] Furthermore, a guard plate opening adapted to the pump inlet and the impeller is provided on one side of the front guard plate.

[0007] Furthermore, a step platform for limiting the rear guard plate is provided on the other side of the front guard plate.

[0008] Furthermore, an annular water pressure chamber is provided in the pump casing.

[0009] Furthermore, the front guard plate and the pump casing are connected by internal angle bolts.

[0010] Furthermore, a mechanical seal is installed at the installation point of the pump casing and the pump shaft.

[0011] Furthermore, the front guard plate and the rear guard plate are both dual-phase steel structures.

[0012] The present utility model has the following beneficial effects compared with the prior art:

[0013] The pump casing and pump cover of the present utility model adopt a structure of a cast iron pump casing and pump cover with a polyethylene lining, and are provided with a front guard plate and a rear guard plate made of a corrosion-resistant and wear-resistant duplex steel structure, which can protect the plastic lining layer at the easily worn parts inside the pump casing and pump cover from being worn, improve the service life of the pump casing and pump cover, and reduce the use cost at the same time.

[0014] The front guard plate of the present utility model is provided with a guide vane, which can effectively improve the efficiency of the pump.

[0015] The water delivery chamber of the pump casing of the present utility model is of an annular flow passage structure, with a relatively large flow area and a slow flow velocity, which can effectively reduce the wear of the flow passage and extend the service life of the pump casing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural view of the present utility model.

[0017] Figure 2 is a sectional view of the present utility model.

[0018] Figure 3 is a schematic structural view of the front guard plate of the present utility model.

[0019] The meanings of the reference numerals are as follows: 1. pump cover; 2. impeller; 3. front guard plate; 4. pump casing; 5. rear guard plate; 6. mechanical seal; 7. bearing box; 8. pump shaft; 9. pump outlet; 10. pump inlet; 11. polyethylene lining; 12. guide vane; 13. guard plate opening; 14. stepped platform; 15. annular water delivery chamber. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The present utility model will be further described below in conjunction with the drawings and specific embodiments.

[0021] As Figures 1 - 3As shown in the figure, a corrosion-resistant and wear-resistant ferrous slag bottom flow pump with a guard plate includes a pump casing 4, a pump outlet 9 is provided on the pump casing 4, a pump cover 1 is installed on one side of the pump casing 4 by bolts, a pump inlet 10 is provided on the pump cover 1, a bearing box 7 is installed on the other side of the pump casing 4 by bolts, a pump shaft 8 is installed in the pump casing 4, an impeller 2 is also installed in the pump casing 4, and the impeller 2 is installed at one end of the pump casing 4. A mechanical seal 6 (the mechanical seal is a prior art) is installed at the installation position of the pump casing 4 and the pump shaft 8. An annular water-pressurizing chamber 15 is provided in the pump casing 4. Polyethylene linings 11 are installed in both the pump casing 4 and the pump cover 1. A front guard plate 3 is installed near the pump inlet 10 in the pump casing 4 and the pump cover 1. The front guard plate 3 is connected to the pump casing 4 by internal angle bolts. Guide vanes 12 are provided on the circumference of the front guard plate 3, and the front guard plate 3 cooperates with the impeller 2. A rear guard plate 5 is provided on one side of the impeller 2 close to the bearing box 7. A guard plate opening 13 adapted to the pump inlet 10 and the impeller 2 is provided on one side of the front guard plate 3. A stepped platform 14 for limiting the rear guard plate 5 is provided on the other side of the front guard plate 3. The limiting rear guard plate 5 is clamped with the guard plate opening 13, and both the front guard plate 3 and the rear guard plate 5 are made of duplex steel structure.

[0022] During operation, the medium enters from the pump inlet 10, then flows through the guard plate opening 13 of the front guard plate 3, does work through the impeller 2, is conveyed to the pump outlet 9 of the pump casing 4, and then to the outlet pipeline. The front guard plate 3 and the rear guard plate 5 can protect the inner lining layers of the easily worn parts inside the pump casing 4 and the pump cover 1 from being worn. The annular flow channel structure water-pressurizing chamber in the pump casing 4 can effectively reduce the wear of the flow channel.

Claims

1. A corrosion-resistant and wear-resistant iron vanadium slag underflow pump with a guard plate, comprising a pump casing (4), a pump outlet (9) is provided on the pump casing (4), a pump cover (1) is installed on one side of the pump casing (4), a pump inlet (10) is provided on the pump cover (1), a bearing box (7) is installed on the other side of the pump casing (4), a pump shaft (8) is installed in the pump casing (4), an impeller (2) is also installed in the pump casing (4), and the impeller (2) is installed at one end of the pump casing (4). Polyethylene linings (11) are installed in both the pump casing (4) and the pump cover (1). It is characterized in that: A front guard plate (3) is installed inside the pump casing (4) and the pump cover (1) near the pump inlet (10). Guide vanes (12) are arranged on the front guard plate (3) along the circumferential direction, and the front guard plate (3) cooperates with the impeller (2). A rear guard plate (5) is arranged on one side of the impeller (2) close to the bearing housing (7).

2. The corrosion-resistant and wear-resistant ferrous slag underflow pump with a guard plate according to claim 1, characterized in that: A guard plate opening (13) adapted to the pump inlet (10) and the impeller (2) is arranged on one side of the front guard plate (3).

3. The corrosion-resistant and wear-resistant ferrous slag underflow pump with a guard plate according to claim 2, characterized in that: A stepped platform (14) for limiting the rear guard plate (5) is arranged on the other side of the front guard plate (3).

4. The corrosion-resistant and wear-resistant ferrous vanadate bottom flow pump with a guard plate according to claim 3, characterized in that: An annular water-pumping chamber (15) is arranged inside the pump casing (4).

5. The corrosion-resistant and wear-resistant ferrous sulfate slag underflow pump with a guard plate according to claim 1, wherein: The front guard plate (3) and the pump casing (4) are connected by inner-angle bolts.

6. The corrosion-resistant and wear-resistant ferrous slag underflow pump with a guard plate according to claim 1, characterized in that: A mechanical seal (6) is installed at the installation position of the pump casing (4) and the pump shaft (8).

7. The corrosion-resistant and wear-resistant iron vanadium slag underflow pump with a guard plate according to claim 1, characterized in that: Both the front guard plate (3) and the rear guard plate (5) are made of duplex steel structure.

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